Casing-head



P. ARBON.

CASING HEAD.

APPLICATION mso APR. 2|. I919. 1,352,423, Patented Sept. 14, 1920.

s SHEETSSHEET 2.

FIELE:

FIGH- WITNESSES INVENTOR 3 a W I CASING HEAD.

APPLwAnoM mm APRJI. r919.

Patented Sept. I4, 1920.

a suzsrwsucjm a.

. FIE.E.

WITNEBES sections,

To all whom it may concern.

' UNITED STATE PATENT OFFICE.

PAUL ARBOR, OF TULSA, OKLAHOMA.

casmannan.

Be it known that I, PAUL Anson, residng at Tulsa in the county of Tulsa and State of 0k ahoma, a .subject of Great Britaim'have invented or discovered certain new and useful Improvements in Casing- Heads, of which improvements the follow ingris a specification. he improvements described herein relate to what is known in the art ascasing heads which are; adapted to be secured to the top of oil well casings for the purpose of con: trolling the escape of oil and gas, such control being effective not only when the tools have been removed but also while the tools are operating in the well. It frequently occurs in drilling wells that the tool will break into the sand containing oil or as or both under a very high pressure which strikes suddenly on the casing head and renders the shifting of the movable member very difficult at a time when quick closing is necessary to avoid waste and dan er.

T e invention described herein has for its object a construction of casing in which pro- "vision is made for establishing between the movable member and the inclosing shell 0. pressure equal to that exerted against the inner surfaces of the movable member by the escaping fluids. It is a further object of the invention to construct the movable member with oppositel disposed'trunnions l1; the axes coinci cut with the axis of armament of the member, and to provide hearings for the trunnions in the inclosing shell. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure 1 is a sectional elevation of a casing head embodying the improvements described herein; Fig. 2 is a view showing the one half of the s ell in plan and the movable member in section; Fig. 3 is a sectional elevation, the lane of section bein indicated by the line Fig. 2, and ig. 4= is a plan view of one halt of the inclosing shell; Figs. 5 and 6 are views similar to Figs. 1 and '2 illustrating 1&1 midification of the construction of easing ea In the practice of the invention the inclosing case or shell'is made in two similar eachsection having flanges wherebe secured together. The shell .by they ma lth nozzles 8, 4, an the is pr vide Specification of Letters Patent. Patented Sept. 14, 1920.

I Application filed April 21, 1919. Serial No. 291,578.

entire nozzles 3 and 4 and one half of the nozzle 5 being formed on the respective sections. The nozzles 3 and 4 are arranged so that their axes will be in alinement, while the nozzle 5 is arranged with its axis at right angles to the axes of the other nozzles. The several nozzles! are rovided with suitable means, as internal tl ireads, whereby the shell may be secured to the well casing and also to the pipe lines. The edge of each section is provided with a semicircular notch 6 at a point ninety degrees from the nozzles and at a point diametrically op osite to the notch which forms a semicircu ar recess 7. These notches and recesses form, when the sections are placed together, bearings for the trunnions 8 and 9 formed on opposite sides or ends of the movable member 10, the trunnion 8 being extended outside of the shell and serving as an operating stem for the movable member. Leakage around this trunnion 8 is revented by a stufling box 11 of any suita le construction. The movable member or valve 9, which may be spherical as shown in Figs. 1 to 4 or cylindrical as shown in Figs. 5 and 6, is made hollow but with ports 12, 13 and 14 so ar ranged as to be in register with the nozzles 3 1, and 5 when the valve is in the position shown in Figs. 1, 3, and 5 and also so arranged as to provide a dead wall 15 adapted when the valve is turned on its trunnions to close either one of the ports leadin to the nozzles 3 and 5, dependent on the irection in which the valve is rotated.

As shown in the several views and particularly in Fig. 4, shallow recesses 16 are formed in the inner surfaces of the shell sections adjacent recesses being connected by narrow channels 17 and the series of recesses in the section intended to be secured to the well casing, are connected to.the nozzle 4 b channels 18, sothat fluids escaping from t e well may flow through the c nels into the recesses. It is preferred that the shallow recesses should extend to the edges of the sections so that the recesses in one of the shell sections will communicate freely with the recesses in the other section. .These recesses which as saated are connected to the nozzle 4, are so a ranged or located and can therefore be easily turned regardless of the pressure in the well.

It will be readily understood by those skilled in the art, that the movable member may be made spherical as shown in Figs. 1 to 4 inclusive, or cylindrical as shown at 10 in Figs. 5 and (S. In both forms provision is made for so balancing pressures in the movable member that it can be easily turned. 1

I claim herein as my invention:

1. A casing head for gas and oil wells having in combination a shell consisting of sections adapted to be detach-ably secured together, each section having a nozzle and a semicircular projection forming one half of a third nozzle and each section havin one half of bearings for trunnions, saii bearings being arranged with their axes at right angles to the axes of the respective nozzles, and a rotatable valve having a diametrical passage therethrough and a passage or opening extending at right angles from the diametrical passage and having trnnnions with their axes at right angles to the axes of said passe s or openings, one of the trunnions extcm ing outside of the shell.

. 2. A casing head for gas and oil wells,

having in combination a shell provided with diametrically arranged nozzles and with a third nozzle arranged at right angles to the other nozzles, the inner wall of the shell having recesses connected to one of the nozzles and a rotatable valve arranged in said shell and havin a stem extending through an opening in the shell.

3. A casing head for having in combination a s ell formed in sections adapted to be detachably secured together each section having a nozzle and a semicircular projection forming one half of a third nozzle and each section having one half of bearings for trunnions, the inner wall of each section having recesses so arranged that when the sectionsare secured together, the recesses in the respective sections will be in communication, and the recesses in one section connected to the nozzle of said section and a rotatable valve having a diametrical passag'e therethrou h and a passage exten ing at ri ht an Fee from the diametrical passage an I provi ed with trunnions, one of said trunnions extending outside of the shell.

In testimony whereof, I have hereunto set my hand.

PAUL ARBON.

as and oil wells 

